Global Patent Index - EP 0394725 A3

EP 0394725 A3 19920212 - CLOCK DESTRIBUTION DEVICE

Title (en)

CLOCK DESTRIBUTION DEVICE

Publication

EP 0394725 A3 19920212 (DE)

Application

EP 90106592 A 19900406

Priority

DE 3914177 A 19890428

Abstract (en)

[origin: US5065454A] In a digital switching center for a telephone switching system or the like, a clock signal distribution arrangement having a redundant central clock generator supplying clock signals to the switching matrices the arrangement including electro-optical transducers, brancher modules, light conductors and opto-electrical transducers connected in signal distribution paths between the clock generator and the switching matrices. The distribution paths are doubled for redundancy purposes.

IPC 1-7

H04L 7/00

IPC 8 full level

H04J 3/06 (2006.01); H04L 7/00 (2006.01)

CPC (source: EP US)

H04L 7/0075 (2013.01 - EP US); H04L 7/0083 (2013.01 - EP US)

Citation (search report)

  • [A] US 3541341 A 19701117 - LEETE BERNARD D
  • [A] US 4359773 A 19821116 - SWARTZ ROBERT G, et al
  • [YD] TELCOM REPORT, BEIHEFT "DIGITALVERMITTLUNGSSYSTEM EWSD " Nr. 4, April 1981, PASSAU DE Seiten 43 - 48; H. GRÜNER ET AL.: 'Synchronisation der Vermittlungseinrichtungen in Digitalnetzen'
  • [Y] IBM TECHNICAL DISCLOSURE BULLETIN. Bd. 23, Nr. 4, September 1980, NEW YORK US Seiten 1423 - 1428; M. FROMER: 'Multi-Point Fiber-optic signal distribution system'
  • [A] NTZ NACHRICHTECHNISCHE ZEITSCHRIFT. Bd. 38, Nr. 10, Oktober 1985, BERLIN DE Seiten 708 - 712; F.C. KUZNIK: 'Vermittlungssystem 5ESS-PRX für den öffentlichen Fernsprechverkehr'
  • [A] ELECTRICAL COMMUNICATION Bd. 63, Nr. 3, März 1989, ROMFORD GB Seiten 249 - 256; F.C. CANO ET AL: 'New Generation of Low Capacity Optical Fibre Line Systems'
  • [AD] OPTO ELEKTRONIK MAGAZIN Bd. 2, Nr. 3, Juni 1986, COBURG DE Seiten 202 - 213; G. KNOBLAUCH: 'Koppel- und Verteilerelemente ( Stecker, Verzweiger, Mischer, Wellenlängenmultiplex-Komponenten )'
  • [A] PATENT ABSTRACTS OF JAPAN vol. 6, no. 147 (E-123)(1025) 6. August 1982 & JP-A-57 068 941 ( FUJITSU ) 27. April 1982

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0394725 A2 19901031; EP 0394725 A3 19920212; EP 0394725 B1 19960214; AT E134284 T1 19960215; DE 59010126 D1 19960328; US 5065454 A 19911112

DOCDB simple family (application)

EP 90106592 A 19900406; AT 90106592 T 19900406; DE 59010126 T 19900406; US 51677390 A 19900430